Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979sva....23..102s&link_type=abstract
(Astronomicheskii Zhurnal, vol. 56, no. 1, 1979, p. 187-199.) Soviet Astronomy, vol. 23, Jan.-Feb. 1979, p. 102-109. Translatio
Astronomy and Astrophysics
Astronomy
1
Atmospheric Pressure, Earth Atmosphere, Earth Rotation, Long Term Effects, Secular Variations, Angular Acceleration, Mountains
Scientific paper
The nature of long-term variations in earth's diurnal rotation rate is investigated. Formulas are derived for calculating irregularities in earth's rotation that result from moments of forces generated by the atmosphere. Variations in earth's rotation rate caused by friction between the atmosphere and the surface and by atmospheric pressure on mountain ranges are computed from data concerning the mean monthly atmospheric pressure at sea level over the whole earth. The results obtained for several dozen sets of values for the theoretical parameters show that the long-term variations in earth's rotation rate are caused by a mechanical effect of the atmosphere on the surface. The problem of angular-momentum balance is briefly discussed.
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